Disabling FIB-entry-limit decrease. Implementing probabilistic interest
acceptance based on accumulated statistics.

Statistics generation is changed to real 1-second averaging
diff --git a/utils/load-stats.h b/utils/load-stats.h
index 3e71753..816998e 100644
--- a/utils/load-stats.h
+++ b/utils/load-stats.h
@@ -62,10 +62,18 @@
   IsZero () const;
   
 private:
-  uint32_t counter_;
+  uint64_t counter_;
 
   double avg1_;
+  uint64_t avg1Counter_;
+  uint64_t avg1CounterOld_;
+  Time   avg1LastUpdate_;
+  
   double avg2_;
+  uint64_t avg2Counter_;
+  uint64_t avg2CounterOld_;
+  Time   avg2LastUpdate_;
+
   double avg3_;
 
   friend std::ostream &